# Sincedb data logic

**URL:** <https://discuss.elastic.co/t/sincedb-data-logic/109569>\
**Category:** Logstash\
**Created:** [November 29, 2017, 10:40am UTC](https://discuss.elastic.co/t/sincedb-data-logic/109569 "2017-11-29T10:40:16Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Bostjan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bostjan/32/24727_2.png) [@Bostjan](https://discuss.elastic.co/u/Bostjan)\
**Post date:** [November 29, 2017, 10:40am UTC](https://discuss.elastic.co/t/sincedb-data-logic/109569/1 "2017-11-29T10:40:17Z")

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Hello!

I have a question regarding how file information is stored in sincedb file. As I understand, structure of file is file inode/major device name/minor device name/byte offset.

What I can see is that all of this information differs from what I get from OS, as example below:

- data in sincedb:

> 7260325595195829238 0 90 13990821

- data from system:

> Device: 26h/38d Inode: 11186418478513722378 Links: 1

From system, I would presume major device number is 2 and minor is 6. Also inode number is different.

Would anyone be so kind to explain how this transition is done?

Thank you and best regards,  
Bostjan

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**Author:** ![JKhondhu](https://avatars.discourse-cdn.com/v4/letter/j/ed655f/32.png) [@JKhondhu](https://discuss.elastic.co/u/JKhondhu)\
**Post date:** [December 1, 2017, 10:45am UTC](https://discuss.elastic.co/t/sincedb-data-logic/109569/2 "2017-12-01T10:45:28Z")

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Hi,  
Cool question. How did you get these system stats?

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<div class="post-metadata">

**Author:** ![Bostjan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bostjan/32/24727_2.png) [@Bostjan](https://discuss.elastic.co/u/Bostjan)\
**Post date:** [December 1, 2017, 10:58am UTC](https://discuss.elastic.co/t/sincedb-data-logic/109569/3 "2017-12-01T10:58:32Z")

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Hello,

I used "stat" + filename.

Have to point out I am running Logstash in docker (possible reason?).

Best regards,  
Bostjan

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 29, 2017, 10:58am UTC](https://discuss.elastic.co/t/sincedb-data-logic/109569/4 "2017-12-29T10:58:50Z")

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